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Cheap flights from London Heathrow Airport to San Francisco from £360

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
6 Apr — 13 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 23 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Francisco
Explore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 March 2026.

Sat 18/407:25
LHR
-
SFO
1 stop15h 05m
United Airlines
Fri 24/419:30
SFO
-
LHR
Nonstop10h 40m
United Airlines
Deal found 2/3£372
Tue 10/313:30
LHR
-
SFO
1 stop14h 40m
Lufthansa
Tue 31/308:10
SFO
-
LHR
2 stops18h 15m
Lufthansa
Deal found 3/3£373
Thu 12/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Mon 16/318:25
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 4/3£374
Thu 12/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Tue 17/313:50
SFO
-
LHR
1 stop14h 25m
United Airlines
Deal found 5/3£375
Fri 13/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Tue 24/322:45
SFO
-
LHR
2 stops15h 35m
United Airlines
Deal found 3/3£375
Fri 13/309:00
LHR
-
SFO
1 stop15h 30m
SWISS
Sun 29/319:35
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 3/3£376
Wed 11/311:10
LHR
-
SFO
2 stops17h 00m
Lufthansa
Wed 18/322:40
SFO
-
LHR
1 stop15h 20m
Lufthansa
Deal found 2/3£377
Tue 10/311:45
LHR
-
SFO
Nonstop11h 15m
British Airways
Tue 24/318:30
SFO
-
LHR
Nonstop10h 30m
British Airways
Deal found 3/3£378
Thu 12/309:30
LHR
-
SFO
1 stop14h 25m
Lufthansa
Wed 25/313:50
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 4/3£378
Thu 12/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Mon 23/322:40
SFO
-
LHR
1 stop17h 15m
United Airlines
Deal found 3/3£379
Mon 9/320:45
LHR
-
SFO
1 stop26h 50m
British Airways
Thu 19/308:00
SFO
-
LHR
1 stop17h 15m
British Airways
Deal found 1/3£380
Thu 21/508:45
LHR
-
SFO
1 stop15h 30m
United Airlines
Tue 26/508:50
SFO
-
LHR
1 stop17h 20m
United Airlines
Deal found 3/3£381

Find flight deals from Heathrow to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7 March 2026.

Round-trip from

£372

One-way from

£360

Popular in

December

Cheapest in

February

Average price

£479

Good round-trip deal

£414 or less

Good one-way deal

£409 or less
United Airlines
  • United Airlines
  • 18/4-24/4
  • 1 total stop
  • 25h 45m total
  • London to San Francisco
Search Deals
Aer Lingus
  • Aer Lingus
  • 18/3
  • 1 total stop
  • 13h 45m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to San Francisco.
Search Deals
Price to beat on a one-way flight from London Heathrow to San Francisco.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 March 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 18/4

06:55-14:30

1 stop15h 35m

San Francisco

Sat 25/4

10:50-09:40

1 stop14h 50m

£372

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 31/5

08:45-16:15

1 stop15h 30m

San Francisco

Sun 7/6

06:15-12:20

1 stop22h 05m

£382

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 24/4

08:40-16:15

1 stop15h 35m

San Francisco

Fri 1/5

12:05-10:10

1 stop14h 05m

£384

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 17/3

13:45-18:00

Nonstop11h 15m

San Francisco

Tue 24/3

13:50-07:25

Nonstop10h 35m

£385

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 9/6

07:25-14:20

1 stop14h 55m

San Francisco

Tue 23/6

05:00-07:40

1 stop18h 40m

£386

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 27/4

08:40-16:15

1 stop15h 35m

San Francisco

Mon 4/5

23:05-21:35

1 stop14h 30m

£387

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 26/4

07:25-14:30

1 stop15h 05m

San Francisco

Sun 3/5

12:50-07:25

Nonstop10h 35m

£390

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 24/3

20:05-17:30

1 stop28h 25m

San Francisco

Tue 31/3

14:30-19:20

2 stops20h 50m

£393

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 28/4

10:35-13:40

Nonstop11h 05m

San Francisco

Fri 8/5

19:40-14:10

Nonstop10h 30m

£395
Fastest return journey

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 3/7

10:35-13:35

Nonstop11h 00m

San Francisco

Fri 10/7

13:00-07:25

Nonstop10h 25m

£410

Flights are sorted by cheapest return flights first.

Deals found on 3/3

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Heathrow to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to San Francisco

How far ahead should I book a flight from London Heathrow Airport to San Francisco?

Use this chart to determine the optimal time to book a return flight from Heathrow to San Francisco. Price data was last updated on 27 February 2026.

The price you pay for your flight from London Heathrow Airport to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 23 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £349). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £442). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to SFO?

Find hourly flight availability from Heathrow to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 March 2026.

When flying from London Heathrow Airport to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 7 March 2026.
See what other customers who have flown with Austrian Airlines, Virgin Atlantic, andUnited Airlines from London Heathrow Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
900 reviews
Check prices

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Austrian Airlines
7.6
Good
900 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Virgin Atlantic
7.5
Good
680 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
United Airlines
7.4
Good
9,404 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Lufthansa
6.8
Okay
7,833 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
British Airways
6.7
Okay
7,778 reviews
Austrian Airlines
7.6
Good
900 reviews
Check prices

Food

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Crew

8.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Francisco from London Heathrow?

    Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London Heathrow. Booking flights from London Heathrow to San Francisco (SFO) should be relatively easy as there are 17 daily inbound flights from London Heathrow from 18 different airlines.

  • How long is the flight from London Heathrow Airport to San Francisco?

    United Airlines can get you from London Heathrow Airport to San Francisco in just under 15h 35m. Your travel time can differ by up to . Airlines will cover a distance of 5350 mi.

  • What are the cheapest airlines flying from London Heathrow Airport to San Francisco round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from £322. Other airlines that can offer you cheap pricing are Air Canada, from £337, and United Airlines, from £348. Delta is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from London Heathrow Airport to San Francisco one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £271. WestJet flights start at £302 while deals on Scandinavian Airlines start at £304 one-way.

  • What are the most reliable airlines from London Heathrow Airport to San Francisco?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to San Francisco on time: KLM (84%), Air France (84%), Delta (84%).

  • What are the cheapest flights from London Heathrow Airport to San Francisco?

    The cheapest flight price from London Heathrow Airport to San Francisco is £377. On average you can expect to pay £1,799. The most popular route, (London Heathrow - San Francisco), can usually be booked for £216.

  • Can I find deals for flights from Heathrow to San Francisco that include hotel bookings?

    Yes. In addition to deals on Heathrow to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Francisco.

  • Can I find deals for business class flights from Heathrow to San Francisco?

    Yes. Cheapflights offers flight deals from Heathrow to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £349). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £442). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale

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Fly from Heathrow to San Francisco on these airlines

Choose from the following airlines for your flight from Heathrow to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 7 March 2026.
Virgin Atlantic flights from London Heathrow to San Francisco
British Airways flights from London Heathrow to San Francisco
Lufthansa flights from London Heathrow to San Francisco

Top 10 airlines flying from Heathrow to San Francisco

Discover the top 10 airlines that operate flights from Heathrow to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 March 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£322Average£576FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£337Average£476FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£348Average£505FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£352Average£535FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
SWISSCheapest£353Average£430FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£360Average£543FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£361Average£453FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£371Average£486FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Virgin AtlanticCheapest£377Average£524FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£377Average£515FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to San Francisco?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from Heathrow.

Can Cheapflights find flights from Heathrow to San Francisco with no change fees?

Yes! Cheapflights helps users easily find flights from Heathrow to San Francisco with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?

Of course! You can now track prices for flights from Heathrow to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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